Lock



Jan. 29, 1924. Y 1,482,189

F. K.,HEYER Filed May 29, 1923 Patented Jan. 29, 1924.

- UNITED STATES 1,482,189 PATENT OFFICE.

FREDERIC K. HEYER, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE &TOWNE MANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

LOCK.

Application filed May 29, 1923.

To all 'iviiomzt may concern:

Be it known that I, Fnnnnnic K. HEYER, a citizen of the United States,and a resident of Stamford, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements in Locks;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make'and use the same. i

This invention relates to improvements in looks and more particularly tosuch as are adapted for use in hotel lock work and to be operated by aplurality of keys,--one object ofthe invention being to so construct thelock that simple and eflicient means shall be provided whereby one keyis used to render the bolt work operable or inoperable and another keyto effect the operation of the bolt work. e

A further object is to provide simple shut-out means between the plugand its cam of that'portion of the lock to be operated by a pass orchange key, said shutout means being operable with the use of a specialkey. p

A further object is to provide a cylinder lock having two key-actuatedplugs, with coupling means for connecting the bolt controlling cam tooneof said plugs and to provide means carried by the other plug andcooperable with said coupling means to disconnect said cam from actualcooperation with the first-mentioned plug,said plugs being operable bydifferent keys.

, With these and other objects in View, the invention consists incertain novel features of construction and combinations of parts ashereinafter set forth and pointed out in the claims.

In the accompanying drawings,-

Figure 1 is a side elevation of a cylinder lock in which my improvementsare embodied.

Figure 2 is a front view of the same.

Figure 3 is a rear View showing positions which parts will assume topermit operation of the lock with a pass key.

Figure 4 is a view partly in elevation and partly in section with theparts in positions to effect coupling of the pass-key-operated cam withits plug.

Figure-5 is a v1ew partly in rear elevation Serial No. 642,253.

and partly in section with the parts positioned as in Figure 4.

Figure 6 is a view partly in elevation and partly in section showing thepass-key operated cam uncoupled fromits plug.

Figure 7 is a View partly in rear elevation and partly in sectionshowing the parts positioned as in Figure 6.

cam. "Figure9 is a view ated cam.

gigure 10 is a view showing the coupler, an

Figure 11 is a separate view of the disk 13. The cylinder 1 of the lockmay be externally threaded as at 2 and provided with longitudinalgrooves 3 whereby the security of the lockin the door maybe effected inany suitable manner. The cylinder lis constructed to receive twokey-actuated plugs 4iand 5, the former being somewhat'longer than thelatter. A. cam 6 adapted for cooperation with bolt work (not shown) ispro vided with a' sleeve 'or'hub portion 7 loosely mounted on the rearend portion of the plug 4,-the latterbeing operable by a pass key. Theplug 4 is made with a recess 8 in which a coupler 9 for connecting thecam 6 with the plug, is disposed. The coupler 9 is formed to receive aspring pressed plunger 10 mounted in the plug 4 and is operable by saidplunger to become disposed ina slot or opening 11in the sleeve portion 7of the cam 6, thus coupling the cam to the plug.

The plug 5 is intended to be operable by means of a special key and toits rear end portion a cam member 12 is secured by means of a disk 13secured to the rear end of the plug. The. cam member 12 is provided withan arm 14: which may engage the sleeve portion of the cam 6 in either ofthe of the passkey-operpositions to which it may be moved. The

cam member 12. is also provided near one side of the arm 14c with a cam15,the latter being operable, when the parts are moved to the positionsshown in Figure 7, to depress the coupler member 9 and thus disconnectthe cam 6 from its plug 4.

When the parts are in the position shown in Figures 6 and 7, the cam 6is disconnected from the pass-key-operated plug 4 so that should a passkey be inserted into said plug and turned, the plug would turn freelyFigure 8 is a view illustrating the shut-out I thus connect said camwith its plug. A pass key may now be employed to turn the plug 4 andwith it the cam 6 to operate the bolt work.

With my improvements the plug 4 may be rendered inoperable by a :passkey to manipulate the bolt work and may be left normally in suchcondition so that in order to permit operation of the lock to move thebolt work it is necessary to effect an active connection of the cam withsaid plug with the .use of a special key operable inanother plug of thelock.

Having fully described my'invention what I claim as new and desire tosecure by Letters Patent, is:

1. In a cylinder lock, the combination with a=cylinder and two keyoperated plugs mounted therein and'adapted for operation bydifferentkeys, of a cam loosely mounted on one of said plugs, and meanscontrolled by the other plug for connecting said cam with anddisconnecting it from the firstmentioned plug.

2. In a cylinder lock, the combination with acylinder and two keyoperated plugs mounted therein and adapted for operation by differentkeys, of acam loosely mounted on one of said plugs, a spring pressedcoupler operable vto connect said cam and plug, and ineans carried bythe other plug for moving said coupler to disconnect said cam from itsplug.

3. In a cylinder lock, .the combination with a cylinder and two keyoperated plugs mounted therein, one of said plugs being operable by apass key and the other of said plugs being operable by a special key, ofa cam loosely mounted on said pass key plug,

a coupler, spring actuated meansfor causing said coupler to connect thepass key plug and its cam, and a cam member carried by the special-keyplug and operable to move said coupler to disconnect said firstmentioned cam from the pass key plug.

4. In a cylinder lock, the combination with a cylinder, and two keyactuated plugs mounted therein, one of said plugs being operable by apass key and the other by a special-key, the pass key plughaving arecess therein, of a cam for the pass key plug, said cam having a sleeveportion mounted loosely on thepass key plug and having a slot ;tocommunicate with the recess in the plug, a spring pressed plungermounted in the pass key plug and operable to force the coupler into theslot of the cam sleeve to couple the cam and plug together, a cam membersecured to the special-key plug and having a cam portionto depress thecoupler for disconnecting the first mentioned cam from activecooperation with the pass key plug, and an arm on said cam memberztoengage the sleeve portion of the first mentioned cam and limit themovement of the special-key plug and cam member thereon in eitherposition to which said special-key plug and cam member may be moved.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

FREDERIC K. H EYER.

Witnesses:

-1OHARLES A. BERRY, FRANK D. Snow.

